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- added language with respect to init() restrictions

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Robert Griesemer 2008-09-26 16:41:50 -07:00
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11
doc/go_spec.txt
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@ -2499,8 +2499,17 @@ functions defined in its source. Since a package may contain more
than one source file, there may be more than one init() function, but
only one per source file.
Initialization code may contain "go" statements, but the functions
they invoke do not begin execution until initialization is complete.
Therefore, all initialization code is run in a single thread of
execution.
Furthermore, an "init()" function cannot be referred to from anywhere
in a program. In particular, "init()" cannot be called explicitly, nor
can a pointer to "init" be assigned to a function variable).
If a package has imports, the imported packages are initialized
before initializing the package itself. If multiple packages import
before initializing the package itself. If multiple packages import
a package P, P will be initialized only once.
The importing of packages, by construction, guarantees that there can